Dry concentrator.



J. F. HILTSGHBR.

DRY GONGENTEATOE.

APPLICATION FILED DEC. 4. 1911. RENEWED JAN. 26, 1914.

1,1 08,499.. Patented Aug. 25, 1914,

Inventor.

witnesses.

THE .JulvlR/S PETERS co.. PHOTO-LITHO. WASHINGTON. 0. cv

" for dry 5 laterally, it being to reciprocate the table roll back and forth thus caused to quickly upon the tracks 8.

As shown in Fig. a the perforations 12 of the pipes 11, are preferably covered by Wire gauze 29 for preventing gravel or particles of ore from entering the pipes 11. The pulverized material, ore bearing sand or gravel. is fed upon the upper end of the table from a chuteBO and will gradually travel down the surface of the table from achute 30 as the same is agitated by the action of the eccentrics l Vhenthe grai'eli, sand or pulp comes in contact with the air blast from the apertures 12, it will be agitated and Whirled in addition to the movement which it receives from the slide motion oi the table and the gravel Will thus be kept moving and no heavy particles of metal can remain at the top but must settle and be caught by the rilfies.

The device Well adapted for use in han dling all kinds of metal bearing rock or gravels or earths, and is especially adapted localities Where it is impossible to obtain Water.

W hat I claim is:

1. A concentrator,

table having transversely extending rifiles formed thereon and air blast pipes extending transversely of the table and supported in contact with and near the upper edges of said riilies, said pipes being adapted to delirer air blast approximately even with the upper edges of the riflies for assisting in the concentration of the ores. w

2. A concentrator, comprising an inclined table having transversely extending rillles upon its tending across the table in contact upper surface, air blast pipes ex- With and adjacent to the top or said rifiies and adapted to deliver an'a'ir blast toward the upper end Oil the table, and means for agitating'the table and said pipes.

In Witness that I claim the foregoing I have hereunto su day of November, 1911.

JO N F. ninrsonsn.

lVitnesses Copies of this patent may be obtained tor five cents each, by addressing the Commissioner of lateuts, wasliifigtomnm i I V I 1 scribed my name thisZTth 

